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Sigma-Aldrich

Trimethylaluminum

97%

Synonym(s):

Aluminum trimethanide, TMA

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About This Item

Linear Formula:
(CH3)3Al
CAS Number:
75-24-1
Molecular Weight:
72.09
Beilstein:
3587197
EC Number:
200-853-0
MDL number:
MFCD00008252
UNSPSC Code:
12352103
PubChem Substance ID:
24855575
NACRES:
NA.23

vapor pressure

69.3 mmHg ( 60 °C)

Quality Level

200

description

heat of vaporization: ~41.9 kJ/mol (dimer)

Assay

97%

form

liquid

reaction suitability

core: aluminum

bp

125-126 °C (lit.)
127 °C/760 mmHg
20 °C/8 mmHg
56 °C/50 mmHg

mp

15 °C (lit.)

density

0.752 g/mL at 25 °C (lit.)

SMILES string

C[Al](C)C

InChI

1S/3CH3.Al/h3*1H3;

InChI key

JLTRXTDYQLMHGR-UHFFFAOYSA-N

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General description

Trimethylaluminum (TMA) is a widely used precursor in the chemical vapor deposition (CVD) process to produce thin films in various applications. TMA is highly reactive and pyrophoric, which makes it an effective source of aluminum in thin film deposition processes to improve optoelectronic properties, such as enhanced light absorption and carrier transport characteristics.

Application

Trimethylaluminum can be used:
  • As a growth initiator to synthesize self-assembled aluminum nanoparticles via atomic layer deposition.
  • As a precursor to synthesize aluminum-doped ZnO thin films(AZO) for electron transport layer of perovskite solar cells. TMA enhances electrical conductivity and thermal stability of perovskite layers.
  • To fabricate Al2O3-coated Si-alloy anodes for Li-ion batteries. This coating helps to suppress the volume expansion of Si and improves cell stability.
  • To fabricate Al2O3-coated graphite electrode with superior anti-self-discharging behavior (260 h) with long stability (900 cycles), for Al-ion battery.

Packaging

Supplied in a Sure/Pac™ cylinder with a 1/4-turn bronze ball valve (Z122661) installed. This has a female 1/4"" NPT outlet thread and is closed with a male 1/4"" NPT carbon steel plug. The plug must be removed before use after ensuring the valve is in the closed position.

Compatible with the following:For instructions please refer to technical bulletin AL-136: The Aldrich Sure/Pac™ Cylinder System

Other Notes

Storage below 20°C may cause crystallization.

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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Pictograms

FlameCorrosion
GHS02,GHS05

Signal Word

Danger

Hazard Statements

H250,H260,H314

Hazard Classifications

Eye Dam. 1 - Pyr. Liq. 1 - Skin Corr. 1B - Water-react 1

Supplementary Hazards

EUH014

Storage Class Code

4.2 - Pyrophoric and self-heating hazardous materials

WGK

nwg

Flash Point(F)

No data available

Flash Point(C)

No data available

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Metalorganic chemical vapor deposition of Al2O3 using trimethylaluminum and O2 precursors: Growth mechanism and crystallinity
Liu X, et al.
Journal of Crystal Growth, 408, 78-84 (2014)
Aluminum oxide from trimethylaluminum and water by atomic layer deposition: The temperature dependence of residual stress, elastic modulus, hardness and adhesion
Oili ME, et al.
Thin Solid Films, 552, 124-135 (2014)
Photo-induced current and its degradation in Al4C3/Al2O3 (0001) grown by metalorganic chemical vapor deposition
Kim D, et al.
Thin Solid Films, 557, 216-221 (2014)
Emese Zsiros et al.
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